Some mails delivered very late.

Some mails delivered very late.

Dear Zoho-Team,

sometimes I have a problem with some mail domains. Especially web.de and yahoo.de need very long until they are arrive in my mailbox. Almost 3 hours or so.

The second thing I've noticed is that often combined domains in form of xxx.xxx@xxx.xxx.xx wouldn't arrive in my mailbox. It returns with the message, "couldn't reach mailbox" or equivalent.

Maybe you will find over short a solution for that problem. I want to use Zoho for business and educational propuse, but I have to know that all mails will arrived.

Many thanks for your help!